Hello Devika,
Thanks for reaching out to Canon USA!
You'll want to ensure you're using the most up-to-date Canon software on your computer. You can download it from the Canon USA site HERE.
Once you have the software installed, if you're still having problems, you'll want to reach out to our US-based support team for assistance. They're available from 10am to 10pm (ET) during the week at 1-800-OK-CANON (800-652-2666).
If you're outside of the USA, you'll need to get in touch with Canon in your country or region for support options by clicking HERE.
We hope this helps!